Head portion of a toothbrush



FIG. 1 is a perspective view of a head portion of a toothbrush according to the present invention;

FIG. 2 is an elevational view of the head portion according to the present invention;

FIG. 3 is an elevational view opposite from that shown in FIG. 2, of the head portion according to the present invention;

FIG. 4 is a planar view of the head portion according to the present invention;

FIG. 5 is a planar view opposite from that shown in FIG. 4, the head portion according to the present invention; and,

FIG. 6 is an end view of the head portion according to the present invention.

The broken lines immediately adjacent the shaded areas represent the bounds of the claimed design and all of the other broken lines represent environmental subject matter. None of the broken lines form part of the claimed design. 

The ornamental design for a head portion of a toothbrush, as shown and described. 